Flame-retardant automatic power-off cable junction box

Abstract

The utility model discloses a flame-retardant automatic power-off cable junction box, which comprises a main body module and a protection module, and the protection module is arranged on the inner wall of a box body and is used for extinguishing fire and cutting off power when the junction box is on fire. Comprising a shell symmetrically fixed on the inner bottom wall of the shell, movable rods symmetrically arranged in an inner cavity of the shell, extending out of the shell and fixedly connected with the bottom end of a movable plate, springs connected with the movable rods and the inner wall of the shell, an air outlet pipe installed on one side of the shell and communicated with the inner cavity of the shell, and a sealing plug arranged in the air outlet pipe. The positioning block is fixed in the middle of the inner bottom wall of the box body, one end of the thermosensitive glass tube is tightly attached to the positioning block, the other end of the thermosensitive glass tube extends into the air outlet pipe, the shell comprises a rectangular shell fixed on the inner bottom wall of the box body and cylindrical shells integrally connected to the two sides of the rectangular shell, and the rectangular shell is communicated with inner cavities of the cylindrical shells. The device has the functions of flame retardance, fire prevention and automatic power-off on fire.

Description

Technical Field

[0001] The utility model relates to the technical field of cable junction boxes, in particular to a flame-retardant automatic power-off cable junction box. Background Art

[0002] Cable junction boxes are the most common and widely used connection devices in the fields of construction and communications. They can protect connector components. In addition to general functional requirements, different types of new cable junction boxes have also been gradually developed.

[0003] The existing cable junction boxes have the following main drawbacks during use: poor flame retardancy and fireproofing performance, lack of effective fire extinguishing structure when a short circuit occurs at the cable connection, and inability to cut off power. Therefore, there are great safety hazards and room for improvement. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a flame-retardant automatic power-off cable junction box, including: a main body module and a protective module, the main body module includes a box body, a cover plate installed on the top of the box body by bolts, a plurality of rubber sleeves symmetrically installed on both sides of the box body and extending into the shell, guide rails symmetrically fixed on the inner wall of the box body, movable plates symmetrically arranged and slidably engaged with the guide rails at the ends, a sleeve-shaped interface installed on the movable plate on one side and a columnar joint installed on the movable plate on the other side, the sleeve-shaped interface and the columnar joint being engaged with each other.

[0006] The protection module includes a shell symmetrically fixed on the inner bottom wall of the shell, a movable rod symmetrically arranged in the inner cavity of the shell and extending out of the shell and fixedly connected to the bottom end of the movable plate, a spring connecting the movable rod and the inner wall of the shell, an air outlet pipe installed on one side of the shell and connected to the inner cavity of the shell, a sealing plug arranged in the air outlet pipe, a positioning block fixed in the middle of the bottom wall of the box body, and a heat-sensitive glass tube with one end close to the positioning block and the other end extending into the air outlet pipe.

[0007] The inner cavity of the shell is filled with high-pressure inert gas.

[0008] In a preferred example, the utility model can be further configured as follows: the shell includes a rectangular shell fixed on the bottom wall of the box body and a cylindrical shell integrally connected to both sides of the rectangular shell, and the inner cavity of the rectangular shell is communicated with the inner cavity of the cylindrical shell.

[0009] In a preferred example, the utility model can be further configured as follows: the movable rod includes a piston movably arranged in the inner cavity of the cylindrical shell, a support rod with one end fixed to the piston and the other end extending out of the cylindrical shell, and a connecting rod with one end fixed to the end of the support rod and the other end fixedly connected to the bottom end of the movable plate.

[0010] In a preferred example, the utility model can be further configured as follows: one end of the spring is fixed to the inner wall of the cylindrical shell, and the other end is fixed to the piston.

[0011] In a preferred example, the utility model can be further configured as follows: a slide groove is provided on the guide rail, and slide bars are provided on both sides of the movable plate, and the slide bars are slidably embedded in the slide groove.

[0012] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0013] 1. In the utility model, a shell is symmetrically fixed on the inner wall of the box body, and a high-pressure inert gas is filled in the inner cavity of the shell. An air outlet pipe is opened on one side of the shell, a sealing plug is arranged in the air outlet pipe, and a positioning block is fixed in the middle of the inner bottom wall of the box body. A thermal glass tube is arranged between the positioning block and the air outlet pipe. When a short circuit occurs and a fire occurs in the cable in the box body, the thermal glass tube bursts due to heat. At this time, the high-pressure inert gas in the shell pushes the sealing plug out of the air outlet pipe, and then is sent out from the air outlet pipe and filled in the box body, thereby reducing the oxygen content in the inner cavity of the box body, so that the flame in the box body is extinguished due to lack of oxygen, thereby realizing the flame retardancy and fire extinguishing of the junction box and improving the practical performance.

[0014] 2. In the utility model, guide rails are installed on both sides of the box body, and two relatively movable plates are movably arranged on the guide rails, a sleeve-shaped interface is installed on the movable plate on one side, and a columnar joint is installed on the movable plate on the other side, the two are interlocked with each other, and movable rods extending out of the shell are installed in the inner cavities on both sides of the shell, the ends of the movable rods are fixed to the bottom ends of the movable plates, and a spring is arranged between the movable rods and the inner wall of the shell. When a fire occurs in the box body, the high-pressure inert gas in the shell is ejected, and the air pressure in the shell is reduced. At this time, the spring releases its elastic force, driving the movable plate to retract into the inner cavity of the shell, and the movement of the movable rod drives the movable plate to move, so that the movable plates on both sides move toward each other, disconnecting the sleeve-shaped interface from the columnar joint, realizing the automatic power-off function when the junction box catches fire, and further improving the practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure decomposition of the utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 4 It is a bottom view schematic diagram of the internal structure of the utility model;

[0019] Figure 5 Partial structural diagram of the utility model

[0020] Figure 6 It is a cross-sectional schematic diagram of the protection module of the present utility model.

[0021] Reference numerals:

[0022] 100, main module; 110, box body; 120, cover plate; 130, rubber sleeve; 140, guide rail; 141, slide groove; 150, movable plate; 151, slide bar; 160, sleeve interface; 170, columnar joint;

[0023] 200, protection module; 210, shell; 211, rectangular shell; 212, cylindrical shell; 220, movable rod; 221, piston; 222, support rod; 223, connecting rod; 230, spring; 240, air outlet pipe; 250, sealing plug; 260, positioning block; 270, thermal glass tube. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] Some embodiments of the present invention are described below in conjunction with the accompanying drawings. Embodiment 1

[0026] Combination Figure 1-6 As shown, this embodiment provides a flame-retardant automatic power-off cable junction box, including: a main body module 100 and a protection module 200 .

[0027] Among them, the main module 100 includes a box body 110, a cover plate 120 installed on the top of the box body 110 by bolts, a plurality of rubber sleeves 130 symmetrically installed on both sides of the box body 110 and extending into the shell 210, a guide rail 140 symmetrically fixed on the inner wall of the box body 110, a movable plate 150 symmetrically arranged and slidably engaged with the end portion on the guide rail 140, a sleeve-shaped interface 160 installed on the movable plate 150 on one side, and a columnar joint 170 installed on the movable plate 150 on the other side.

[0028] The box body 110 is used to install other components and provide protection for the cable connections. The cover 120 is used to facilitate opening of the box body 110. The rubber sleeve 130 is used for the cable to pass through the box body 110 and adhere to the surface of the cable to ensure the sealing of the inner cavity of the box body 110 and prevent dust and water stains from entering the inner cavity of the box body 110 from the cable inlet.

[0029] The guide rail 140 is used to install the movable plate 150 and facilitate the movement of the movable plate 150. The movable plate 150 is used to install the sleeve interface 160 and the columnar joint 170, and drive the two to move at the same time. A slide groove 141 is opened on the guide rail 140, and slide bars 151 are set on both sides of the movable plate 150. The slide bars 151 are slidably engaged in the slide groove 141 to ensure the stability of the movement of the movable plate 150.

[0030] The sleeve interface 160 and the columnar connector 170 are interlocked and connected to the cable. When the two are interlocked, the current can pass smoothly. When the two are disconnected, the power can be cut off.

[0031] The protection module 200 is installed on the inner wall of the box body 110, and is used to extinguish the fire and cut off the power when the junction box catches fire. It includes a shell 210 symmetrically fixed on the inner bottom wall of the shell 210, a movable rod 220 symmetrically arranged in the inner cavity of the shell 210 and extending out of the shell 210 and fixedly connected to the bottom end of the movable plate 150, a spring 230 connecting the movable rod 220 and the inner wall of the shell 210, an air outlet pipe 240 installed on one side of the shell 210 and connected to the inner cavity of the shell 210, a sealing plug 250 arranged in the air outlet pipe 240, a positioning block 260 fixed in the middle of the inner bottom wall of the box body 110, and a thermal glass tube 270 with one end close to the positioning block 260 and the other end extending into the air outlet pipe 240.

[0032] The shell 210 includes a rectangular shell 211 fixed on the inner bottom wall of the box body 110 and a cylindrical shell 212 integrally connected to both sides of the rectangular shell 211, and the inner cavities of the rectangular shell 211 and the cylindrical shell 212 are connected. The inner cavity of the shell 210 is filled with high-pressure inert gas, which is convenient for spraying and filling the inner cavity of the box body 110 when a fire occurs, thereby reducing the oxygen content in the inner cavity of the box body 110, so that the flame in the box body 110 is extinguished due to lack of oxygen, thereby achieving flame retardancy and fire extinguishing of the junction box.

[0033] The movable rod 220 is used to drive the movable plate 150 to move, and includes a piston 221 movably arranged in the inner cavity of the cylindrical shell 212, a support rod 222 with one end fixed on the piston 221 and the other end extending out of the cylindrical shell 212, and a connecting rod 223 with one end fixed on the end of the support rod 222 and the other end fixedly connected to the bottom end of the movable plate 150. The piston 221 is close to the inner wall of the cylindrical shell 212 and is used to install the support rod 222 and the spring 230, and transfer the high-pressure inert gas pressure in the inner cavity of the shell 210 to the spring 230 to squeeze the spring 230. The support rod 222 is used to install the connecting rod 223. The connecting rod 223 fixedly connects the support rod 222 and the movable plate 150 together, so that when the support rod 222 moves, it can drive the movable plate 150 to move synchronously.

[0034] One end of the spring 230 is fixed to the inner wall of the cylindrical shell 212, and the other end is fixed to the piston 221. When the high-pressure inert gas in the shell 210 is not released, the gas pressure exerts pressure on the piston 221, so that the spring 230 remains in a contracted state. When the high-pressure inert gas is released, the air pressure in the shell 210 decreases. At this time, the elastic force of the spring 230 is greater than the pressure of the air pressure. The release of the spring 230 drives the piston 221 to move, and the movement of the piston 221 drives the movable plate 150 to move through the support rod 222.

[0035] The air outlet pipe 240 is used to discharge the high-pressure inert gas in the shell 210. The sealing plug 250 is movably arranged in the air outlet pipe 240 to ensure the sealing of the air outlet pipe 240. The positioning block 260 is used to install the thermal glass tube 270. One end of the thermal glass tube 270 is close to the positioning block 260, and the other end is embedded in the air outlet pipe 240. When the inner cavity of the shell 210 is filled with high-pressure inert gas, the sealing plug 250 is attached to the end of the thermal glass tube 270 under the action of air pressure. When the temperature of the thermal glass tube 270 is higher than a specific temperature, it will burst due to heat. At this time, the high-pressure inert gas in the shell 210 pushes the sealing plug 250 out of the air outlet pipe 240, so that the high-pressure inert gas is discharged into the inner cavity of the box body 110.

[0036] The working principle and use process of the utility model are as follows: when a short circuit occurs in the cable in the box body 110 and a fire occurs, the thermosensitive glass tube 270 bursts due to the heat, and at this time, the high-pressure inert gas in the shell 210 pushes the sealing plug 250 out of the air outlet pipe 240, and then is sent out from the air outlet pipe 240 to fill the box body 110, thereby reducing the oxygen content in the inner cavity of the box body 110, so that the flame in the box body 110 is extinguished due to lack of oxygen. At the same time, due to the ejection of the high-pressure inert gas in the shell 210, the air pressure in the shell 210 is reduced, and the spring 230 releases its elastic force, driving the movable rod 220 to move toward the inner cavity of the shell 210. The movement of the movable rod 220 drives the movable plate 150 to move, so that the baffles on both sides move toward each other, that is, the sleeve-shaped interface 160 is disconnected from the columnar joint 170, so as to realize automatic power-off of the cable.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flame retardant automatic power-off cable junction box, comprising: A main body module (100) and a protective module (200), characterized in that the main body module (100) comprises a box body (110), a cover plate (120) mounted on the top of the box body (110) by bolts, a plurality of rubber sleeves (130) symmetrically mounted on both sides of the box body (110) and extending into the shell (210), a guide rail (140) symmetrically fixed on the inner wall of the box body (110), a movable plate (150) symmetrically arranged and slidably engaged with the guide rail (140) at its end, a sleeve-shaped interface (160) mounted on the movable plate (150) on one side, and a columnar joint (170) mounted on the movable plate (150) on the other side, wherein the sleeve-shaped interface (160) and the columnar joint (170) are engaged with each other; The protection module (200) comprises a shell (210) symmetrically fixed on the inner bottom wall of the shell (210), a movable rod (220) symmetrically arranged in the inner cavity of the shell (210) and extending out of the shell (210) and fixedly connected to the bottom end of the movable plate (150), a spring (230) connecting the movable rod (220) and the inner wall of the shell (210), an air outlet pipe (240) installed on one side of the shell (210) and communicating with the inner cavity of the shell (210), a sealing plug (250) arranged in the air outlet pipe (240), a positioning block (260) fixed in the middle of the inner bottom wall of the box body (110), and a heat-sensitive glass tube (270) with one end close to the positioning block (260) and the other end extending into the air outlet pipe (240); The inner cavity of the shell (210) is filled with high-pressure inert gas.

2. A flame retardant automatic power-off cable junction box according to claim 1, characterized in that: The housing (210) comprises a rectangular shell (211) fixed on the inner bottom wall of the box body (110) and a cylindrical shell (212) integrally connected to both sides of the rectangular shell (211), and the inner cavities of the rectangular shell (211) and the cylindrical shell (212) are in communication.

3. A flame retardant automatic power-off cable junction box according to claim 2, characterized in that: The movable rod (220) comprises a piston (221) movably arranged in the inner cavity of the cylindrical shell (212), a support rod (222) having one end fixed to the piston (221) and the other end extending out of the cylindrical shell (212), and a connecting rod (223) having one end fixed to the end of the support rod (222) and the other end fixedly connected to the bottom end of the movable plate (150).

4. A flame retardant automatic power-off cable junction box according to claim 3, characterized in that: One end of the spring (230) is fixed to the inner wall of the cylindrical shell (212), and the other end is fixed to the piston (221).

5. The flame-retardant automatic power-off cable junction box according to claim 1, characterized in that: The guide rail (140) is provided with a slide groove (141), and slide bars (151) are provided on both sides of the movable plate (150), and the slide bars (151) are slidably engaged in the slide groove (141).

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